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Section 7 2025 Urban Water Management Plan <br />Water Supply Reliability Assessment City of Pleasanton <br /> Public Draft | May 2026 <br /> 7-16 EKI Environment & Water, Inc. <br />Table 7-7 Projected Zone 7 Supplies for Drought Risk Assessment <br />Water Source <br />Available Supply (AFY) <br />2026 2027 2028 2029 2030 <br />Equivalent Hydrologic Year Actual 1988 1989 1990 1991 <br />SWP Table A 24,186 7,961 32,793 4,897 5,185 <br />SWP Carryover 14,000 8,441 9,270 9,098 5,946 <br />Water Transfers 1,000 3,000 0 3,000 3,000 <br />Arroyo Valle 5,000 2,672 4,934 2,876 3,014 <br />Chain of Lakes 0 0 0 0 0 <br />Main Basin (Local <br />Groundwater) 30,000 30,000 30,000 30,000 30,000 <br />Non-Local Storage Programs 13,379 19,287 21,955 19,287 19,287 <br />Sites Reservoir 0 0 0 0 0 <br />Total 87,565 71,361 98,952 69,157 66,431 <br />7.5.3 Drought Risk Assessment Total Water Supply and Use Comparison <br />In Chapter 7 of its 2025 UWMP, Zone 7 has indicated it can meet retailer demands during a five-year <br />drought beginning in 2026. Therefore, Zone 7 supplies are assumed to equal the City’s projected potable <br />water demands after accounting for the City’s GPQ (3,500 AFY). Recycled water supply is assumed to be <br />unaffected by dry conditions and therefore recycled water supply is also equal to demand. Demands for <br />2026-2029 are linearly interpolated from 2025 actual use to 2030 projected uses. <br />As shown in Table 7-8, during a five-year drought beginning in 2026, the City’s supplies are adequate to <br />meet projected demands through 2030, even without water conservation. However, the City may still <br />prioritize water conservation under such drought conditions to reduce demand and conserve supply for <br />potentially future dry years.